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  <title>Document</title>
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  <ol>
    <li>去买菜</li>
    <li>炒菜</li>
    <li>可以吃饭啦</li>
  </ol>
  <ul>
    <li>前端课程</li>
    <li>后端课程</li>
    <li>测试课程</li>
  </ul>
  <dl>
    <dt>人</dt>
    <dd>一种哺乳动物</dd>
  </dl>
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